We don't have a bread box, but I'd like to get one.
I think they look great and serve a good function; namely a place to put your bread.
Currently, we keep bread in the bag it came which isn't all that great.Pros of bread boxes:
They can look great and add some style to your kitchen. Think red or vintage or rustic bread box
They keep your counter clean if you're in the habit of storing bread on a cutting board.
They don't cost very much.Cons of bread boxes:
It's another kitchen thing-a-ma-jig to clean.
They take up space, which isn't a big deal if there's bread in it, but not cool if you don't have bread in it (then it serves no purpose). Of course, you can store other stuff in them... not just bread.
While I fall on the minimalist end of the "stuff" spectrum, and while bread boxes are not a necessity, I love bread and would like to have a stylish or vintage bread box to adorn my kitchen.